Upper rack recieves water for only a few seconds.
I removed the lower spray arm down to the diverter tube and ball. Everything is clean.
What switches the water to the upper rack.
I see there is a ball on an incline which i assume acts like a check valve.
What causes the valve to switch.
Thanks for your help
[quote=southern Tree;371709]Upper rack recieves water for only a few seconds.
I removed the lower spray arm down to the diverter tube and ball. Everything is clean.
What switches the water to the upper rack.
I see there is a ball on an incline which i assume acts like a check valve.
What causes the valve to switch.
Thanks for your help[/quote]
Southern tree,
Your check ball sytem is controlled through water pressure and motor pauses.
(see below)
The more important consideration, is that the unit is filling properly, low water level, produces low pressure.
After the unit has filled and washed for 5 minutes, there should be approximately 1/2 inch of water in the bottom of the tub(slightly coverring the heater support bracket(minimum).
[FONT=Arial][SIZE=2][FONT=Arial][SIZE=2][LEFT]The force of the water entering and leaving the arm
causes it to turn by the positioning of the hole in the
spray arm. The rear hole which is molded in the
sump has a small section removed above where the
check ball sets, this section allows a small amount of
water to by-pass the check ball and enter the delivery
tube mounted up the out side rear of the tub. Water
by-passing the check ball will fill the delivery tube at a
rate of approximately four inches a second. This
water will be used to change the spray from bottom
to the upper two spray arms. All wash and rinse
cycles will start by spraying from the lower wash arm.
Changing spray from bottom to upper spray arms is
accomplished with the control stopping the wash
pump for not more then .6 of a second. This pause
removes water pressure from the rear of the check
ball, water that had accumulated in the delivery tube
now reenter the sump, which moves the check ball[/LEFT]
away from the hole and up the ramp.
Good Luck,
[/SIZE][/FONT][/SIZE][/FONT]
[FONT=Arial][SIZE=2][FONT=Arial][SIZE=2][LEFT]This wash system is designed to spray from only one
arm or one set of arms at a time. The advantage of
this is that it reduces the amount of water needed in
the tub. The way this system operates is explained
as follows.
The check ball rests at the end of a ramp molded
into the sump partially blocking the rear hole. As
water under pressure enters the volute cover, the
check ball is held tightly into the rear hole restricting
water flow from this opening. Water can only leave
the remaining hole from the top of the volute cover
into the lower spray arm.
Alternating the spray is achieved with a check ball
moving between two holes in the sump. One hole is
located in the rear of the sump used to supply water
to the upper two spray arms; the second is located
out the top of the volute cover onto which is mounted[/LEFT]
the lower spray arm.
[/SIZE][/FONT][/SIZE][/FONT]
[quote=Joe / APP Team;372571]Southern tree,
Your check ball sytem is controlled through water pressure and motor pauses.
(see below)
The more important consideration, is that the unit is filling properly, low water level, produces low pressure.
After the unit has filled and washed for 5 minutes, there should be approximately 1/2 inch of water in the bottom of the tub(slightly coverring the heater support bracket(minimum).
[LEFT][FONT=Arial][SIZE=2][FONT=Arial][SIZE=2]The force of the water entering and leaving the arm[/SIZE][/FONT]
[SIZE=2][FONT=Arial]causes it to turn by the positioning of the hole in the[/FONT][/SIZE]
[SIZE=2][FONT=Arial]spray arm. The rear hole which is molded in the[/FONT][/SIZE]
[SIZE=2][FONT=Arial]sump has a small section removed above where the[/FONT][/SIZE]
[SIZE=2][FONT=Arial]check ball sets, this section allows a small amount of[/FONT][/SIZE]
[SIZE=2][FONT=Arial]water to by-pass the check ball and enter the delivery[/FONT][/SIZE]
[SIZE=2][FONT=Arial]tube mounted up the out side rear of the tub. Water[/FONT][/SIZE]
[SIZE=2][FONT=Arial]by-passing the check ball will fill the delivery tube at a[/FONT][/SIZE]
[SIZE=2][FONT=Arial]rate of approximately four inches a second. This[/FONT][/SIZE]
[SIZE=2][FONT=Arial]water will be used to change the spray from bottom[/FONT][/SIZE]
[SIZE=2][FONT=Arial]to the upper two spray arms. All wash and rinse[/FONT][/SIZE]
[SIZE=2][FONT=Arial]cycles will start by spraying from the lower wash arm.[/FONT][/SIZE]
[SIZE=2][FONT=Arial]Changing spray from bottom to upper spray arms is[/FONT][/SIZE]
[SIZE=2][FONT=Arial]accomplished with the control stopping the wash[/FONT][/SIZE]
[SIZE=2][FONT=Arial]pump for not more then .6 of a second. This pause[/FONT][/SIZE]
[SIZE=2][FONT=Arial]removes water pressure from the rear of the check[/FONT][/SIZE]
[SIZE=2][FONT=Arial]ball, water that had accumulated in the delivery tube[/FONT][/SIZE]
[SIZE=2][FONT=Arial]now reenter the sump, which moves the check ball[/FONT][/SIZE][/LEFT]
[SIZE=2][FONT=Arial]away from the hole and up the ramp.[/FONT][/SIZE]
[SIZE=2][FONT=Arial]Good Luck,[/FONT][/SIZE]
[SIZE=2][FONT=Arial] [/FONT][/SIZE]
[/SIZE][/FONT]
[LEFT][FONT=Arial][SIZE=2][FONT=Arial][SIZE=2]This wash system is designed to spray from only one[/SIZE][/FONT]
[SIZE=2][FONT=Arial]arm or one set of arms at a time. The advantage of[/FONT][/SIZE]
[SIZE=2][FONT=Arial]this is that it reduces the amount of water needed in[/FONT][/SIZE]
[SIZE=2][FONT=Arial]the tub. The way this system operates is explained[/FONT][/SIZE]
[SIZE=2][FONT=Arial]as follows.[/FONT][/SIZE]
[SIZE=2][FONT=Arial]The check ball rests at the end of a ramp molded[/FONT][/SIZE]
[SIZE=2][FONT=Arial]into the sump partially blocking the rear hole. As[/FONT][/SIZE]
[SIZE=2][FONT=Arial]water under pressure enters the volute cover, the[/FONT][/SIZE]
[SIZE=2][FONT=Arial]check ball is held tightly into the rear hole restricting[/FONT][/SIZE]
[SIZE=2][FONT=Arial]water flow from this opening. Water can only leave[/FONT][/SIZE]
[SIZE=2][FONT=Arial]the remaining hole from the top of the volute cover[/FONT][/SIZE]
[SIZE=2][FONT=Arial]into the lower spray arm. [/FONT][/SIZE]
[SIZE=2][FONT=Arial]Alternating the spray is achieved with a check ball[/FONT][/SIZE]
[SIZE=2][FONT=Arial]moving between two holes in the sump. One hole is[/FONT][/SIZE]
[SIZE=2][FONT=Arial]located in the rear of the sump used to supply water[/FONT][/SIZE]
[SIZE=2][FONT=Arial]to the upper two spray arms; the second is located[/FONT][/SIZE]
[SIZE=2][FONT=Arial]out the top of the volute cover onto which is mounted[/FONT][/SIZE][/LEFT]
[SIZE=2][FONT=Arial]the lower spray arm.[/FONT][/SIZE]
[/SIZE][/FONT][/quote]
Thank You
I wondered what caused the water to divert to the upper rack.
The .6 second or less pump pause and tube water pressure is an interesting design.
I will check the water level and watch the switch to upper tube.
[quote=southern Tree;372670]Thank You
I wondered what caused the water to divert to the upper rack.
The .6 second or less pump pause and tube water pressure is an interesting design.
I will check the water level and watch the switch to upper tube.[/quote]
Southern tree,
Glad we could help you out.
That pump system has been used for quite a while, pretty efficient most of the time.
But like all dishwashers, water level and water temperature, are a couple of the more important components for proper operation and washability.
Good Luck,
Joe
I watched the water level and machine cycle and found you can activate the pump pause and divert water to the upper rack by a quick tap on the door release handle which pauses the puimp.
The timer stops the water supply before the float begins to rise.
The water level reaches the heater bracket but does not go half way up the verticle bracket.
The upper rack does not wash the dishs clean.
Is there a way to provide more water to the bin thru the timer.
Should the float switch stop the water supply instead of the timer.
Or is there another problem.
Thanks for your time, again.
[quote=southern Tree;373556]Joe
I watched the water level and machine cycle and found you can activate the pump pause and divert water to the upper rack by a quick tap on the door release handle which pauses the puimp.
The timer stops the water supply before the float begins to rise.
The water level reaches the heater bracket but does not go half way up the verticle bracket.
The upper rack does not wash the dishs clean.
Is there a way to provide more water to the bin thru the timer.
Should the float switch stop the water supply instead of the timer.
Or is there another problem.
Thanks for your time, again.[/quote]
Southern Tree,
There is no way to increase the water level or fill time, through the control.
A basic rule of thumb, when the unit is started and filling,if we have a proper water supply, there should be a few second pause between the end of the fill, and when the wash pump motor starts(at least).
So, yes the float switch should stop the water before the timer, fill cycle times out.
At this point, I’d replace the fill valve and “flush” the water supply line to the dishwasher.
Good Luck,